Rack assembly for front-loading dishwasher

ABSTRACT

In a front-loading dishwashing machine of the type having a front access opening to a washing chamber, and dish-supporting racks that may be manually slid outwardly from the chamber and through the access opening to facilitate loading of the machine with soiled tableware, a means is provided whereby when one dishsupporting rack is manually pulled outwardly to extend from the front of the dishwashing machine, another rack positioned at a different horizontal level is caused to move outwardly without the need for the operator of the machine to separately grasp the second rack and pull it outward through the access opening. It is also provided, when the dish-supporting racks are in their normal operating position, within the washing chamber, that the second rack may be manually moved outwardly independent the first rack, if so desired. The construction of the invention is particularly applicable to a dishwashing machine wherein upper and lower level racks are spaced substantially distant from one another within the wash chamber so that large or cumbersome articles can be conveniently stored for washing in the lower level rack.

United States Patent {72] Inventor Melvin R. Kauffman Louisville, Ky. [2]] Appl. No. 817,033 [22] Filed Apr. 17, 1969 {45] Patented July 20, 1971 [73] Assignee General Electric Company [54] RACK ASSEMBLY FOR FRONT-LOADING [56] References Cited 1 UNITED STATES PATENTS 1,889,218 11/1932 Reedy 312/301 3,295,907 1/1967 Galvin 312/298 3,466,109 9/1969 Kauffman et a1. 312/338 3,486,804 12/1969 Kauffman et a1.

Primary Examiner-Jordan Franklin Assistant Examiner-Geo. V. Larkin Attorneys-James E. Espe, Harry F. Manbeck, Jr, Joseph B.

Forman, Oscar B. Waddell and Frank L. Neuhauser ABSTRACT: In a front-loading dishwashing machine of the type having a front access opening to a washing chamber, and dish-supporting racks that may be manually slid outwardly from the chamber and through the access opening to facilitate loading of the machine with soiled tableware, a means is provided whereby when one dish-supporting rack is manually pulled outwardly to extend from the front of the dishwashing machine, another rack positioned at a different horizontal level is caused to move outwardly without the need for the operator of the machine to separately grasp the second rack and pull it outward through the access opening. It is also provided, when the dish-supporting racks are in their normal operating position, within the washing chamber, that the second rack may be manually moved outwardly independent the first rack, if so desired. The construction of the invention is particularly applicable to a dishwashing machine wherein upper and lower level racks are spaced substantially distant from one another within the wash chamber so that large or cumbersome articles can be conveniently stored for washing in the lower level rack.

PATENTED JuLzolsn V 3.594058 sum 2 OF 2 I Flsz INVENT )R, MELV\N R KAUF'F MAN ms ATTORNEY RACK ASSEMBLY FOR F RONT-LOADING DISHWASHER BACKGROUND OF THE INVENTION This invention broadly relates to an improved rack assembly for a front-loading dishwasher utilizing dish supporting racks mounted to be horizontally slidable so as to extend outwardly through a front access opening to enable soiled tableware to be conveniently placed in the racks for washing.

More particularly, the invention relates to an improvement for both a conventional rack assembly such as presently used in front-loading dishwashers where upper and lower racks are independently slidably mounted in the machine's wash chamber, and for a more sophisticated rack arrangement wherein separately supported vertically adjustable side-byside racks constitute the upper rack level, such as described in the US. Pat. issued Sept. 9, 1969 to Melvin R. Kauffman and Wesley S. Pattison, US. Pat. No. 3,466,109 entitled Front Opening Dishwasher With Improved Rack Assembly" and assigned to the General Electric Company, the assignee of the present invention.

An object of the present invention is to provide means by which a housewife operating a front-loading dishwasher can manually slide the racks located on diflerent levels outwardly from the machine's washing chamber by a simple one-hand motion.

Another object of this invention is to provide a simplified means -.of manually imparting a unitary sliding action to a pair of vertically spaced apart racks in a dishwasher while allowing for independent horizontal manual sliding of each rack on its own slidable support means, as desired by the operator.

SUMMARY OF THE INVENTION In a presently preferred form of the invention, push means is provided, in a front-loading automatic dishwasher, on each of a pair of side-by-side separately slidable upper racks whereby manual withdrawal of either of the upper racks will cause a substantially larger lower rack to move outwardly in unison with the withdrawn upper rack. In this embodiment of the invention, the lower rack may be freely independently moved inwardly or outwardly with respect to the washing chamber when the upper pair of racks are positioned entirely within the washing chamber, and either of the upper racks may be independently manipulated on its slide support means so long as the lower rack is in its outward position with respect to the washing chamber.

In a second modified form of the invention, a conventional independently slidable single upper rack may be provided with push means to engage a lower rack and cause the lower rack to move outwardly in unison with the upper rack. In this form, each of the racks has a horizontal cross-sectional area substantially the same as that of the washing chamber, and the lower rack is free to be manipulated horizontally inwardly or outwardly on its independent support means, without engagement with the upper rack, so long as the upper rack is permitted to remain in its normal operating position within the upper portion of thewashing chamber. When the lower rack is in its outwardly extended position with respect to the washing chamber, then the upper rack may be freely independently moved inwardly or outwardly without engagement with the lower rack.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a front elevational view of an automatic dishwasher, partly cut away to show details of its internal construction; and

FIG. 2 is a side elevational view of the dishwasher first illustrated in FIG. 1, here shown with sidewall portions cut away to reveal various internal components as they are disposed to facilitate loading of the dishwashing machine.

DESCRIPTION OF THE PREFERRED EMBODIMENT Illustrated in FIG. 1 is an automatic dishwasher having an outer housing or cabinet 10 comprised of a top side or inner upper sidewall 11, a rear wall 12, and opposite sidewalls l3 and 14. The interior of the cabinet 10 is divided by a bottom chamber wall or wash chamber floor 15 into an upper area or washing chamber 16 and a lower motor-pump assembly area 17. Across the lower front side of the cabinet 10 is a front lower panel 18 that serves a front side of the motor-pump assembly area 17. The upper portion of the front side of the cabinet 11 is a door 19 provided with hinges 21 (see FIG. 2) at its lower end so that it may be opened from its closed vertical position to a substantially horizontal orientation to permit access to the washing chamber 16 through a front access opening 20. Y

In the area 17 in the lower end of the cabinet 11 is housed a motor-pump assembly 25 having 'a pedestal 26 extending upwardly therefrom through an opening in the wash chamber floor 15 for supporting a rotatable reactive-type spray arm 27. The wash chamber floor 15 has a second opening therethrough leading to a sump 28 for the purpose of drainage and recirculation of washing liquid between the wash chamber 16 and the motor-pump assembly 25.

The apparatus heretofore described is considered represen tative of conventional dishwashers and the present invention is not intended to be limited to such construction. It is intended that the dishwasher may be modified or provided with additional equipment other than that which is shown without restricting the present invention.

Within the washing chamber 16 of the cabinet 10, as illustrated in FIG. 1, a lower rack 30 is adapted to be slidable horizontally outwardly through the access opening 20 over the open door 19. The rack 30 is constructed of interconnected verticaland horizontal rodlike members or rigid wires that form the general configuration of a shallow four-sided basket for receiving soiled tableware to be washed in the washing chamber 16. The rack 30 thus comprises a floor portion 31 having a front fence 32, a rear fence 33 and opposed side fences 34 extended upwardly from the edge of the floor ortion 31. The horizontal cross-sectional area of the rack 30 is substantially equal to that of the washing chamber 16. The lower rack 30 is also provided with lower edge side rollers 36 that test, when the lower rack 30 is in its operating position within the washing chamber 16, on ridgelike tracks or horizontal surfaces 37 formed on opposite inside surfaces of the respective sidewalls 13 and 14 of the cabinet 10. Parallel spaced apart indentations or tracks 38 are provided on the inner surface of the door 19, and are aligned with the corresponding ridges 37, when the door 19 is in its open position, to form continuous tracks along which the rack 30 may be drawn outwardly to rest with its forward end on the door 19. The outward-sliding movement of the rack 30 is usually accomplished by the operator of the machine who, after having opened the door 19, grasps the rack 30 by placing the hand on the front fence 32 and pulling the rack 30 out over the door 19.

Situated in the upper region of the washing chamber 16 and spaced substantially apart from the lower rack 30 is a support means preferably including a pair of slidably supported sideby-side frames or rack supporting sections 41, each of which carries an upper rack 47 removably attached thereto. Each of the open frames 41 has the general configuration of a plane rigid rectangle having front and rear parallel frame rails 42 connecting opposed side rails 43.

The outer edge of each of the frames 41 is supported for slidable movement, on the inner surface of the cabinet sidewalls l3 and 14, by means of separate roller assemblies 50. As illustrated in FIG. 2, each roller assembly 50 comprises four rollers 51 group mounted on the inner surfaces of each cabinet wall 13 or 14 and properly spaced to slidably support a slide bar 53 for substantially horizontal sliding movement between upper and lower pairs of the rollers 51. The slide bar 53 is provided with longitudinallydisposed forward and rearward horizontally aligned slots 54, each of which acts as a trackway for a rack roller 52 joumaled to the outer edge portion or outer side rail of the rack 41.

A roller assembly 60 supports the inner edges of the respective racks 41, as illustrated in H6. 1. The roller assembly 60 comprises a rigid hanger plate 61 having one end thereof attached to the inner upper sidewall or top 11 of the cabinet 10, with rollers 62 and 63 journaled at the lowermost end of the hanger 61 for rotation on respective horizontal axes. The inner edge of each frame 41 is carried between the upper roller 62 and the lower roller 63 for movement of the frame 41 inwardly and outwardly with respect to the washing chamber 16. 1

Each upper rack 47 is carried on its frame 41 by means of a pair of clips 56 integral to the forward edge or front rail 42 of the frame 41, and books 57 integral to the rearward edge or rear rail 42 of the frame 41. Each upper rack 47 is vertically adjustable with respect to its supporting frame 41, inasmuch as each rack 47 may be disengaged from clips 56 and hooks 57 and repositioned so that the clips 56 and hooks 57 attach to other horizontally disposed side rails of the forward and rear fences of the rack 43.

A rigid armlike push bar 46 is provided at the rearward edge of each frame 41 to act as a push means for imparting'sliding movement to the lower rack 30 when the frame 41 is caused to slide outwardly through the access opening 20. As illustrated in FIG. 1, each push bar 46 may be formed of two leg portions the upper ends of which are fixedly joined to the rear edge of the frame 41 and the lower ends of which unite in a smoothly curved configuration that extends downwardly behind the rear fence portion 33 of the lower rack 30.

From the foregoing description of the various elements shown in the accompanying drawings, it will be seen that utilization of a push means such as the push bars 46 provides an added convenience in that manual withdrawal of an upper rack 47 through the access opening 20 of the dishwasher serves the dual purpose of withdrawing both the upper rack 47 and the lower rack 30 to their outwardly extended position over the open front door 19 of the machine to facilitate front loading.

With the lower rack 30 in its outward loading position, the upper racks 47 are freely maneuverable and may be pushed back to the retracted position within the washing chamber 16 to give unobstructed access to the open top of the lower rack 30.

In addition to the preferred form shown in the drawings, it is intended that the push means be applicable to the more conventional rack arrangement wherein a lower rack having a horizontal cross section substantially the same as that of the washing chamber is utilized along with a single independently slidably mounted upper rack having a horizontal cross-sectional area substantially equal to that of the lower rack.

It is considered evident from the foregoing description that certain aspects of the invention are not limited to the particular construction of the specific example or embodiment illustrated. It should be understood that various modifications may be made therein, and it is intended that the appended claims cover all such modifications as fall within the true spirit and scope of the invention.

lclaim:

1. in a dishwashing machine of the type having top, bottom and sidewalls defining an inside washing chamber, and an access opening through one of the sidewalls, an improved rack assembly for supporting articles to be washed within the chamber, comprising:

a. a lower rack mounted within a lower portion of the chamber and slidable outwardly in a substantially horizontal plane through the access opening;

b. an upper rack mounted above said lower rack, said upper rack vertically spaced substantially distant from said lower rack and slidable outwardly in a substantially horizontal plane through the access 0 ening; and c. push means mounted on one of sat racks and actuated by manual sliding of one of said racks and operable to cause the other of said racks to slide outwardly through the access opening.

2. The combination set forth in claim 1, wherein:

said push means comprises a downward extending portion of said upper rack that acts to engage a portion of said lower rack and urges said lower rack outwardly when said upper rack is manually moved outwardly through the access opening.

3. The combination of claim 2 wherein: 7

said push means disengages from said lower rack when said upper rack is manually retracted back through the access opening.

4. The combination set forth in claim 1 wherein:

a. said push means comprises an armlike downward projection extending from said upper rack; and

b. a portion of said projection intersects the plane of movement of said lower rack.

5. The combination set forth in claim 1, wherein:

said lower rack is slidable inwardly and outwardly independent of said upper rack, and said upper rack is inwardly slidable independent of said lower rack.

6. The combination set forth in claim 1, wherein:

a. said upper rack comprises a left section'and a right section;

b. each of said sections is separately supported for slidable movement independent of each other; and

c. said push means operates to urge said lower rack to slide outwardly when either of said sections is manually slid outwardly through the access opening.

7. The combination set forth in claim 6, wherein:

said push means is disengaged from said lower rack when both of said sections are in their retracted position within the wash chamber whereby said lower. rack is independently slidable relative to said sections.

8. In an automatic dishwasher of the type including a cabinet having top, bottom and sidewalls and an access opening in one of the sidewalls, an improved rack assembly for supporting articles to be washed within the cabinet; comprising:

-a. a lower rack positioned within -a lower portion of the cabinet for substantially horizontal movement through the access opening;

b. support means for supporting a plurality of generally sideby-side removable upper racks selectively at different elevations above said lower rack for substantially horizontal sliding movement through the access opening independent of said lower rack and one another; and

0. means extending downwardly from said support means for contacting said lower rack and causing said lower rack to move outwardly through the access opening when one of said upper racks is moved outwardly through the access opening.

9. The combination set forth in claim 8 wherein said support means comprises a plurality of generally side-by-side open frames, and each of said frames has a downward projecting member integral to the rear portion thereof, said downward projecting member has a lower end portion thereof intersecting the plane of movement of said lower rack at the back end of said lower rack whereby, when either of said frames is caused to move outwardly through the access opening, the downward-projecting member contacts the back end of said lower rack andcauses said lower rack to move outwardly in unison with said frame.

10. The combination set forth in claim 8 wherein said lower rack is slidable inwardly and outwardly independent of said upper rack, and said upper rack is inwardly slidable independent of said. lower rack. 

1. In a dishwashing machine of the type having top, bottom and sidewalls defining an inside washing chamber, and an access opening through one of the sidewalls, an improved rack assembly for supporting articles to be washed within the chamber, comprising: a. a lower rack mounted within a lower portion of the chamber and slidable outwardly in a substantially horizontal plane through the access opening; b. an upper rack mounted above said lower rack, said upper rack vertically spaced substantially distant from said lower rack and slidable outwardly in a substantially horizontal plane through the access opening; and c. push means mounted on one of said racks and actuated by manual sliding of one of said racks and operable to cause the other of said racks to slide outwardly through the access opening.
 2. The combination set forth in claim 1, wherein: said push means comprises a downward extending portion of said upper rack that acts to engage a portion of said lower rack and urges said lower rack outwardly when said upper rack is manually moved outwardly through the access opening.
 3. The combination of claim 2 wherein: said push means disengages from said lower rack when said upper rack is manually retracted back through the access opening.
 4. The combination set forth in claim 1 wherein: a. said push means comprises an armlike downward projection extending from said upper rack; and b. a portion of said projection intersects the plane of movement of said lower rack.
 5. The combination set forth in claim 1, wherein: said lower rack is slidable inwardly and outwardly independent of said upper rack, and said upper rack is inwardly slidable independent of said lower rack.
 6. The combination set forth in claim 1, wherein: a. said upper rack comprises a left section and a right section; b. each of said sections is separately supported for slidable movement independent of each other; and c. said push means operates to urge said lower rack to slide outwardly when either of said sections is manually slid outwardly through the access opening.
 7. The combination set forth in claim 6, wherein: said push means is disengaged from said lower rack when both of said sections are in their retracted position within the wash chamber whereby said lower rack is independently slidable relative to said sections.
 8. In an automatic dishwasher of the type including a cabinet having top, bottom and sidewalls and an access opening in one of the sidewalls, an improved rack assembly for supporting articles to be washed within the cabinet; comprising: a. a lower rack positioned within a lower portion of the cabinet for substantially horizontal movement through the access opening; b. support means for supporting a plurality of generally side-by-side removable upper racks selectively at different elevations above said lower rack for substantially horizontal sliding movement through the access opening independent of said lower rack and one another; and c. means extending downwardly from said support means for contacting said lower rack and causing said lower rack to move outwardly through the access opening when one of said upper racks is moved outwardly through the access opening.
 9. The combination set forth in claim 8 wherein said support means comprises a plurality of generally side-by-side open frames, and each of said frames has a downward projecting member integral to the rear portion thereof, said downward projecting member has a lower end portion thereof intersecting the plane of movement of said lower rack at the back end of said lower rack whereby, when either of said frames is caused to move outwardly through the access opening, the downward-projecting member contacts the back end of said lower rack and causes said lower rack to move outwardly in unison with said frame.
 10. The combination set forth in claim 8 wherein said lower rack is slidable inwardly and outwardly independent of said upper rack, and said upper rack is inwardly slidable independent of said lower rack. 